Abstract: Society of Motion Picture and Television Engineers (SMPTE) video data is separated into first data and second data. A first signal is formed based on the first data. A second signal is formed based on the second data. The first signal is transported via a first Optical Carrier 3 (OC-3) channel. The second signal is transported via a second OC-3 channel.

Abstract: A method comprises determining a plurality of time intervals Tp and Tn within a variable bit rate (VBR) representation of an image sequence. The time intervals Tp are those in which a number of blocks of information per unit time is greater than a baseline value. The time intervals Tn are those in which a number of blocks of information per unit time is less than the baseline value. A second representation of the image sequence is created in which some blocks of information Bp are removed from the time intervals Tp and interlaced with blocks of information Bn in the time intervals Tn to reduce a variation in a number of blocks of information per unit time between the time intervals Tp and Tn.

Abstract: A system for transporting content to subscriber premises includes a centralized content repository, a subscriber unit, and a network connecting the subscriber unit and repository. The content can be video, image, or other files and the network can include a digital subscriber line (DSL) link. The repository stores higher quality parts of decomposed content files. The subscriber unit locally stores lower quality parts of the content files corresponding to the higher quality parts in the repository. The lower quality parts can be downloaded to the subscriber unit during off-peak hours. During operation, a subscriber selects a locally stored file. In response to the selection, the repository downloads at least one of the higher quality parts corresponding to the selected file to be combined with one of the lower quality parts stored by the subscriber unit for real-time presentation of the content.

Abstract: An ATM-Ethernet portal/concentrator permits a transparent interconnection between Ethernet segments over an ATM network to provide remote connectivity for Ethernet segments. The portal includes an Ethernet controller and an ATM cell processor, both of which receive and transmit data to and from a dual port shared memory under control of a direct memory access controller. A control microprocessor monitors and controls the shifting of data through the dual port memory. In this scheme, original data is written and read directly into and out of the dual port memory to thereby eliminate any requirement for copying of data, to thereby significantly increase the data throughput capability of the portal. In the concentrator embodiment, a plurality of Ethernet controllers, each of which is connected to its own associated Ethernet segment, is multiplexed through the concentrator to an ATM network to thereby provide remote connectivity for each of the Ethernet segments.

Abstract: An ATM-Ethernet portal/concentrator permits a transparent interconnection between Ethernet segments over an ATM network to provide remote connectivity for Ethernet segments. The portal includes an Ethernet controller and an ATM cell processor, both of which receive and transmit data to and from a dual port shared memory under control of a direct memory access controller. A control microprocessor monitors and controls the shifting of data through the dual port memory. In this scheme, original data is written and read directly into and out of the dual port memory to thereby eliminate any requirement for copying of data, to thereby significantly increase the data throughput capability of the portal. In the concentrator embodiment, a plurality of Ethernet controllers, each of which is connected to its own associated Ethernet segment, is multiplexed through the concentrator to an ATM network to thereby provide remote connectivity for each of the Ethernet segments.